Speed-changing mechanism.



W. H. HOLLAND.

SPEED CHANGING MECHANISM.

APPLICATION FILED NOV. 20, 1909.

965,461 v Patented July 26, 1910.

TERS co., wAsnmcwlv, n. c.

"AN FFTQE.

WILLIAM: H. HOLLAND, OF SOUTH BEND, INDIANA.

SPEED-CHANGING MECHANISM.

To all whom it may concern:

Be it known that I, .VILLIAM H. Hon- LAND, a citizen of the UnitedStates, residing at South Bend, in the'county of St. Joseph and State ofIndiana, have'invented certain new and useful Improvements inSpeed-Changing Mechanisms, of which the following is a specification.

This invention relates to speed changing mechanisms.

One object of the invention is to provide for the variable speed ofdriven shafts through the instrumentality of an easily operatedselective locking means.

Another object resides in the provision of a speed changing mechanismembodying driven gears which are driven selectively by cooperativedriving gears selectively locked for cooperation with the respectivedriven gears.

With the above and other objects in view, the present invention consistsin the combination and arrangement of parts hereinafter more fullydescribed, illustrated in the accompanying drawings, and particularlypointed out in the appended claims, it'being understood that changes maybe made in the form, proportion, size and minor details withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

In the drawings :Figure 1 illustrates the upper portion of a drill presswith my in-- vention applied thereto. Fig. 2 is a top plan view. Fig. 3is a longitudinal sectional view through a portion of the countershaftto illustrate the selective gear locking mechanism.

Referring now more particularly to the accompanying drawings thereference character 1 indicates a portion of a drill press upon whichare journaled the driving shaft 2, the driven shaft 3 and thecountershaft 4;, the countershaft 4 being preferably hollow and providedwith a slot'5 for a purpose presently explained. The driving shaft 2receives its motion from any suitable source (not shown) which may haveconnection with the drive wheel 6, and the driven shaft 3 is adapted todrive the drill spindle or other shaft 7 through the instrumentality ofcooperating gears 8.

The driving and countershafts 2 and 41 respectively are connectedtogether by the gears 9 and 10' mounted on the respective 3 shafts 2 and4;, the gears of the respective Specification of Letters Patent.

Application filed November 20, 1908.

Patented July 26, 1910. Serial No. 529,017.

shafts being adapted to be thrown into and out of speed-changingrelation through the lnstrumentality of any suitable clutch mechanism,the type of which is immaterial for the purposes of this invention andis therefore not illustrated. Such clutch mechanism may be operated bythe hand lever 12 pivoted at 13 on the arm 14. These gears 9 10 aredesigned to increase or decrease the speed of the countershaft 1relative to the driving shaft 2.

F ixedly mounted on the driven shaft 3 are spur gears 15 adapted foralinement and mesh with the gears 16 loosely mounted upon the hollowcountershaft 1.

Slidably mounted within the countershaft 1 is a member 17 provided'witha recess 18 in which is pivoted intermediate its ends, as

at 19, a locking lever 20 having one end provided with a projectingportion 22 adapted to extend through the aforesaid slot 5 of the hollowcounters haft and engage the groove the projecting portion 22 of thelocking lever 20 normally projects through the slot 5, by virtue of thespring 20 for engagement in the several grooves 23 formed in the hubs ofeach of the gears 16, the gears 16 being preferably spaced by collars 2dadapted to pre vent the locking lever from engaging the grooves ofadjoining wheels at the same time.

The shiftable member 17 is provided with a handle 25 whereby it may beshifted backwardly and forwardly in the countershaft 4: and this member17 and itshandle: 25 are preventedfrom rotating upon rotation of thecountershaft by virtue of the arm 26 secured to the drill press 1passing through the slot 27 of the handle 25, the arm 26 being providedwith notches 28 in its lower edge for interchangeable engagement of theprojection 29 ont-he lever 30 pivoted at 31 and having a portion 32adapted to engage the head 33 of the rod 34 slidably mounted in themember 17 and which at its inner end has a beveled enlargement 35adapted to engage the corresponding end of the locking lever 20 andshift it upon its pivot 19 to the dotted line position shown in Fig. 3so that the locking lever will not be in locking relation with any ofthe gears .16. The spindle 3 1 is pressed normally outward by the spring36 encircling the same and disposed within the hollow member 17. Theupper end of and the arm 32 of the lever 30 merely rests against thehead 33 of the rod 3 1 and does not interfere with the latter as itrotates with the countershaft 4c.

The cooperative relation between the lever 30 and the arm 26 providesfor an indication as to the proper distance to which the looking keymust be shifted to engage given gear, and while the handle 25 may beloosely mounted on the end of the shifting member 17, it is preventedfrom rotating during ro-- tation of thecountershaft by reason of the arm26 extending through the opening 27 of the handle, as before stated.

lVhat is claimed is 2- 1. In a device of the character described,

-a hollow shaft provided with a slot, gears mounted loosely on theshaft, a member slidably mounted in the shaft and provided with arecess, a locking lever pivotally mounted in the recess and adapted toproject through said slot for selective engagement with said gears, anda spring controlled rod operable for engagement with the locking leverto shift it out of locking position.

2. In a device of the character described, a hollow shaft provided witha slot, gears loosely mounted on the shaft, a member slidably mounted inthe shaft and provided with a recess, a lever pivotally mounted in therecess of the sliding member and having a portion adapted to projectthrough the slot of the hollow shaft for engagement with and toselectively lock the loose gears to the shaft, a handle loosely mountedon the slid able member for operating the latter, said handle having anopening, an arm extending through said opening to prevent rotation ofthe handle during rotation of the slidable member, a rod carried by theslidable memher and having a portion arranged for engagement with saidlever to throw the latter out of operative position, and a lever forengagement with the rod to operate the latter to throw the locking leverout of operative position.

3. In a device of the character described, a hollow shaft provided witha slot, gears mounted loosely on the shaft, a member slidably mounted inthe shaft and provided with a recess, a locking lever pivotally mountedin the recess for selective engagement with said gears, and a rodmounted in the slidable member and provided at its inner end with abeveled face adapted for engagement with the locking lever to shift thelatter out of cooperative engagement with said gears.

4:. In a device of the character described, a hollow shaft provided witha slot, gears loosely mounted on the shaft, a member slidably mounted inthe shaft and provided with a recess, a lever pivotally mounted in therecess of the sliding member and having a portion adapted to projectthrough the slot of the hollow shaft for engagement with and selectivelylock the loose gears to the shaft and also to lock the slidable memberrotatably to the shaft, a handle loosely mounted on the slidable memberfor operating the latter, said handle having an opening, an armextending through said opening to prevent rotation of the handle duringrotation of the slidable member, a spring actuated'rod carried by theslidable member and having a portion arranged for engagement with saidlever to throw the latter out of operative position, and a leverextending through the opening of the aforesaid handle and having an armfor engagement with the rod to operate the latter to throw the lockinglever out of operative position.

5. In a device of the character described, a hollow shaft provided witha slot, gears loosely mounted on the shaft, a member slidably mounted inthe shaft and provided with a recess, a lever pivot-ally mounted in there cess of the sliding member and having a portion adapted to projectthrough the slot of the hollow shaft for engagement with and toselectively lock the loose gears to the shaft, a handle loosely mountedon the slidable member for operating the latter, said handle having anopening, an arm extending through said opening to prevent rotation ofthe handle during rotation of the sliding member, a spring actuated rodcarried by the slidable member and having a portion arrangedforengagement with said lever to throw the latter out of operativeposition, and a lever for engagement with the rod to operate the latterto throw the locking lever out of operative position.

6. In a device of the character described, a hollow shaft provided witha slot, gears loosely mounted on the shaft, a member slidably mounted inthe shaft and provided with a recess, a lever pivotally mounted in therecess of the sliding member and having a portion adapted to projectthrough the slot of the hollow shaft for engagement with and toselectively look the loose gears to the shaft, a handle loosely mountedon the slidable member for operating the latter,

said handle having an opening, an arm ex- 7. In a device of thecharacter described,

a hollow shaft provided with a slot, gears loosely mounted on the shaft,a member slidably mounted in the shaft and provided with a recess, alever pivotally mounted in the recess of the sliding member and having aportion adapted to project through the slot of the hollow shaft forengagement with and to selectively lock the loose gears to the shaft andalso to lock the slidable member rotatably to the shaft, a handleloosely mounted on the slidable member for operating the latter, saidhandle having an open ing, an arm extending through said opening toprevent rotation of the handle during rotation of the slidable member, aspring actuated rod carried by the slidable member and having a portionarranged for engagement with said lever to throw the latter out ofoperative position, and a lever extending through the opening of theaforesaid handle and having an arm for engagement with the rod tooperate the latter to throw the lock-- ing lever out of operativeposition, said arm having notches and said lever having a pro jectionadapted to engage the notches to determine the position of the lockinglever with respect to the gears.

8. In a device of the character described, a hollow shaft provided witha slot, a set of gears loosely mounted on the shaft, a member slidablymounted in the shaft and provided with a recess, a lever pivotallymounted in the recess of the slidable member and having a portionadapted to project through the slot of the shaft for selectiveengagement with said gears to lock them to the shaft and also to lockthe slidable member rotatably to the shaft, a handle loosely mounted onthe slidable member for operating the latter, said handle having anopening, an arm extending through said opening to prevent rotation ofthe handle during rotation L of the slidable member, a spring actuatedrod carried by the slidable member and having a portion arranged forengagement with said lever to operate it to throw its projecting portioninwardly of the hollow shaft through the slot of the latter, a leverextending through the opening of the aforesaid handle and having an armfor engagement with the rod to operate the latter to throw the lockinglever out of operative position, said arm having notches and said leverhaving a projection adapted to engage the notches to determine theposition of the locking lever with the respective gears, and spacingcollars between the gears to prevent the locking lever engaging adjacentgears.

9. In a device of the character described, a rotatable shaft, a set ofgears loosely mounted on the shaft, a spring controlled locking levercarried by the shaft for selective engagement with said gears to lockthem selectively on the shaft, and a spring controlled rod operable forengagement with the locking lever to shift it outof locking positionagainst the action of its spring.

In testimony whereof I afiix my signa ture, in presence of twowitnesses.

WILLIAM H. HOLLAND.

Witnesses G. M. COLE, L. D. WAHLEN.

